alex and dave went to taco bell. alex ordered 2 tacos, x, and 3 chalupas, y. dave ordered 3 tacos and 5 chalupas. alex's bills was $8 and dave's bill was $13. how much was each taco? each chalupa?

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187

How do you solving the solution of each system using elimination?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics